diff --git a/services/core/java/com/android/server/wm/TaskStack.java b/services/core/java/com/android/server/wm/TaskStack.java
index 4308ff9..6527883 100644
--- a/services/core/java/com/android/server/wm/TaskStack.java
+++ b/services/core/java/com/android/server/wm/TaskStack.java
@@ -923,7 +923,9 @@
 
     void resetAnimationBackgroundAnimator() {
         mAnimationBackgroundAnimator = null;
-        mAnimationBackgroundSurface.hide();
+        if (mAnimationBackgroundSurface != null) {
+            mAnimationBackgroundSurface.hide();
+        }
     }
 
     void setAnimationBackground(WindowStateAnimator winAnimator, int color) {